The flotilla was made up of many more nationalities than just turks.

Though of course it is highly reasonable to say that if the turks have a bad human rights record then its fine for the IDF to murder people.

As for the evidence of the IDF firing first, go back and watch the videos and read the posts again.

Testimony from the ships company says that they were subject to covering fire before the troops landed.

This is corroborated by the live news reports in which the anchors are reporting injured passengers, while at the same time speculating that troops may be about to be deployed from the visible helicopters above.

Troops are then seem abseiling down and the anchor confirms that they have started to board.